Bistable spreading head harness

The invention is directed to a spreading head harness for headphones or headsets and to headphones or headsets having a spreading head harness of this kind. In order to provide a spreading head harness for headphones or headsets which automatically spreads when opening or widening and remains spread during use and in which the partial harnesses are automatically brought together again after use, it is suggested to use partial harnesses and/or connection members of which the end areas twist around the longitudinal axis relative to the spring regions, the end areas are bent relative to the curvature, and a mechanical tension is generated in the partial harness when mounted.